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S/UNI-QUAD
PMC-Sierra, Inc.
PM5349 S/UNI-QUAD
DATASHEET
PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
40
majority of I bits inverted + previous NDF_enable, inc_ind
or dec_ind more than 3 frames ago
inv_point not any of above (i.e., not norm_point, and not
NDF_enable, and not AIS_ind, and not inc_ind and not
dec_ind)
new_point disabled_NDF + ss + offset value in range of 0 to 782 but
not equal to active offset
inc_req majority of I bits inverted + no majority of D bits inverted
dec_req majority of D bits inverted + no majority of I bits inverted
Note 1.- active offset is defined as the accepted current phase of the SPE
(VC) in the NORM_state and is undefined in the other states.
Note 2 - enabled NDF is defined as the following bit patterns: 1001, 0001,
1101, 1011, 1000.
Note 3 - disabled NDF is defined as the following bit patterns: 0110, 1110,
0010, 0100, 0111.
Note 4 - the remaining six NDF codes (0000, 0011, 0101, 1010, 1100, 1111)
result in an inv_point indication.
Note 5 - ss bits are unspecified in SONET and has bit pattern 10 in SDH
Note 6 - the use of ss bits in definition of indications may be optionally
disabled.
Note 7 - the requirement for previous NDF_enable, inc_ind or dec_ind be
more than 3 frames ago may be optionally disabled.
Note 8 - new_point is also an inv_point.
Note 9 - LOP is not declared if all the following conditions exist:
• the received pointer is out of range (>782),
• the received pointer is static,
• the received pointer can be interpreted, according
to majority voting on the I and D bits, as a
positive or negative justification indication,
• after making the requested justification, the received
pointer continues to be interpretable as a
pointer justification.